Elements of astronomy: accompanied with numerous illustrations, a colored representation of the solar, stellar, and nebular spectra, and celestial charts of the northern and the southern hemisphere (1875)
Lockyer, Norman, Sir, 1836-1920 · New York, D. Appleton and company · leaf 291
willhere suffice to describethe first-mentioned meth-od, adopted by Caven-dish in 1798. The weightof any thing is a measureof the Earths attrac-tion. Cavendish, there- Fig. 110.—The Cavendish Experiment. A B, r. ■, , ■.-, the small leaden balls on the rod G. D E, lore> tooK tw0 Small the… … be determined ? 519. What must we first find? Why is it not sufficient to. de-termine the Earths bulk ? 520. In what three ways has the Earths density been EARTHS MASS, HOW DETERMINED. 285 wooden rod six feet long, suspended by a fine wire. Whenthe rod was at rest, he placed two large leaden balls…
Astronomy
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